Fix DeclarationResolver handling of annotations containing closures.

pkg/analyzer/lib/src/generated/declaration_resolver.dart

Index: pkg/analyzer/lib/src/generated/declaration_resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/declaration_resolver.dart b/pkg/analyzer/lib/src/generated/declaration_resolver.dart
index d67bc4c02fed6bfa911fa18ea90dd0b41c59bd12..4b16bfca969d98d4aa511248f9975fd55e481494 100644
--- a/pkg/analyzer/lib/src/generated/declaration_resolver.dart
+++ b/pkg/analyzer/lib/src/generated/declaration_resolver.dart
@@ -9,7 +9,9 @@ import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/exception/exception.dart';
+import 'package:analyzer/src/dart/element/builder.dart';
 import 'package:analyzer/src/dart/element/element.dart';
+import 'package:analyzer/src/generated/resolver.dart';
 
 /**
  * A visitor that resolves declarations in an AST structure to already built
@@ -51,6 +53,17 @@ class DeclarationResolver extends RecursiveAstVisitor<Object> {
   }
 
   @override
+  Object visitAnnotation(Annotation node) {
+    // Annotations can only contain elements in certain erroneous situations,
+    // in which case the elements are disconnected from the rest of the element
+    // model, thus we can't reconnect to them.  To avoid crashes, just create
+    // fresh elements.
+    ElementHolder elementHolder = new ElementHolder();
+    new ElementBuilder(elementHolder, _enclosingUnit).visitAnnotation(node);
+    return null;
+  }
+
+  @override
   Object visitCatchClause(CatchClause node) {
     SimpleIdentifier exceptionParameter = node.exceptionParameter;
     if (exceptionParameter != null) {